/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.engine.storagegroup;

import org.apache.iotdb.commons.service.metric.MetricService;

/**
 * The TsFileProcessorInfo records the memory cost of this TsFileProcessor.
 */
public class TsFileProcessorInfo {

    /**
     * Once tspInfo updated, report to storageGroupInfo that this TSP belongs to.
     */
    private DataRegionInfo dataRegionInfo;

    /**
     * memory occupation of unsealed TsFileResource, ChunkMetadata, WAL
     */
    private long memCost;

    public TsFileProcessorInfo(DataRegionInfo dataRegionInfo) {
        this.dataRegionInfo = dataRegionInfo;
        this.memCost = 0L;
        if (null != dataRegionInfo.getDataRegion()) {
            MetricService.getInstance()
                    .addMetricSet(
                            new TsFileProcessorInfoMetrics(
                                    dataRegionInfo.getDataRegion().getDatabaseName(), memCost));
        }
    }

    /**
     * called in each insert
     */
    public void addTSPMemCost(long cost) {
        memCost += cost;
        dataRegionInfo.addStorageGroupMemCost(cost);
    }

    /**
     * called when meet exception
     */
    public void releaseTSPMemCost(long cost) {
        dataRegionInfo.releaseStorageGroupMemCost(cost);
        memCost -= cost;
    }

    /**
     * called when closing TSP
     */
    public void clear() {
        dataRegionInfo.releaseStorageGroupMemCost(memCost);
        memCost = 0L;
    }
}
